Question

A wave travelling along a
string is described by,
y(x, t) = 0.005 sin (80.0 x – 3.0 t),
in which the numerical constants are in
SI units (0.005 m, 80.0 rad m–1, and
3.0 rad s–1). Calculate (a) the amplitude,
(b) the wavelength, and (c) the period and
frequency of the wave. Also, calculate the
displacement y of the wave at a distance
x = 30.0 cm and time t = 20 s ?